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GEOS-101 > Earth's Origins > Flashcards

Earth's Origins Flashcards

1
Q

All of the space that we can see

A

Universe

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2
Q

What is the universe made up of?

A

Millions of Galaxies

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3
Q

Large star cluster with a central core/black holes

A

Galaxy

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4
Q

What are galaxies made up of?

A

Millions of star systems

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5
Q

Single star (usually) containing planets with moons

A

Star Systems

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6
Q

Small rocky and dense (the 4 closest planets)

A

Terrestrial Planets

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7
Q

Large, made up of light gases

A

Jovian Planets

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8
Q

Consists of comets and dwarf planets

A

Kuiper Belt

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9
Q

The universe began with this explosion (14 billion years ago)

A

Big Bang

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10
Q

The galaxy that formed along with many others (10 Billion years ago)

A

Milky Way

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11
Q

Formed from a spinning dust cloud (6 billion years ago)

A

Solar System

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12
Q

A massive star explosion

A

Supernova

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13
Q

What evidence is there for Supernovas?

A

Earth has elements heavier than iron (Uranium, gold, lead, etc) that only supernovas can create

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14
Q

A cloud of space dust from the supernova that condenses down into our Sun and planets

A

Nebula

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15
Q

Slow gradual gathering of dust particles

A

Accretion

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16
Q

Violent impacts of larger planetary chunks

A

Collision

17
Q

What evidence is there for collision?

A

Venus spins backward, Earths large moon

18
Q

How do planets form?

A

Accretion and Collision

19
Q

What are the three sources of heat?

A

Hot Nebula
Heat of Impacts
Radio-activity

20
Q

How do we know that the Earth was not the first star in our area of space?

A

A supernova occurred

21
Q

How did Earth’s moon form?

A

A collision such as a Mars-sized impacter hit us

22
Q

What was the Earth like right after it first formed?

A

Molten

23
Q

What happened to create the Earth’s different layers?

A

The Heaviest material (mostly pure iron) sank down to form a dense molten CORE
Lighter molten rocks formed a thick MANTLE and thin CRUST
Gasses like carbon dioxide and water vapor formed an outer HYDROSPHERE and ATMOSPHERE

GEOS-101 (36 decks)

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